37
Remote control
The arbitrary mode can be terminated by 3 different
means:
❙
By pressing the OUTPUT key (only in mixed-mode)
❙
By means of the command STP
❙
By means of the command OP0
While a waveform is being generated, the front panel con-
trols are disabled, except in mixed mode. The arbitrary
mode can be terminated by pressing the OUTPUT button
in mixed mode, but the arbitrary-signal proceeds internal.
This also has the effect of switching off the outputs. Pres-
sing this button again switches the outputs of the power
supply on.
The waveform generation starts either after the receiption
of the command RUN or if the signal at the BNC-socket
(TRIGGER IN/OUT) changes from HIGH to LOW.
Eine Kurvenform wird entweder nach Empfang des Be-
fehls RUN oder wenn das Signal an der BNC-Buchse
(TRIGGER IN/OUT) von HIGH nach LOW wechselt,
erzeugt.
During arbitrary mode the right display shows the actual
values of channel II, if the outputs are activated or the nomi-
nal values are displayed of the outputs are offf.
The display of channel II shows 8 dashes. After the arbitrary
function has finished, the arbitrary mode is left automatically
and the left display shows the values set. A re-start of the ar-
bitrary function begins whith the first value.
While the arbitrary function is running, the current limit set
cannot be changed. The current in either direction cannot
exceed the programmed value. In order to prevent jitter of
the waveform, no data should be transferred via the inter-
face while the function is running.
Exception: the terminating command STP and the com-
mands OP1 and OP0.
ABT:
Format: ABT:<list of values>N<number of repetitions>
ABT:tVV.mVmV tVV.mVmV .... Nn or
ABT
:
tVV.mVmV tVV.mVmV .... Nn
If the arbitrary-function is started by an external trigger signal,
only one signal period will be generated.
Fig. 8.1: Display of
channel I in arbitrary mode
t = time code 0–9, A, B,C, D, E, F; VV.mVmV =
0–30 V
N = end of table character
n = number of repetitions
n =
0 : Continuous repetition
n =
1-255: Waveform is repeated 1-255 times
Function: Programming of the arbitrary waveform func-
tion.
The power supply permits creation of a data list
containing up to 1024 voltage values along with
the corresponding time duration values. This list
is transferred in the form of a series of alterna-
ting values for voltages in the range between
0.00 and 30.0 V and codes representing the time
duration of each voltage; at the end of the list,
the number of repetitions is indicated.
How long each voltage appears at the outputs
of the HM8143 is derived from the following
table:
0
h
= 100 µs
1
h
= 1 ms
2
h
= 2 ms
3
h
= 5 ms
4
h
= 10 ms
5
h
= 20 ms
6
h
= 50 ms
7
h
= 100 ms
8
h
= 200 ms
9
h
= 500 ms
A
h
= 1 s
B
h
= 2 s
C
h
= 5 s
D
h
= 10 s
E
h
= 20 s
F
h
= 50 s
Example: It is wished to program the following waveform:
1 s
10.00 V
3 s 30.00 V
100 ms 25.67 V
200 µs 2.00 V
It is also wished to repeat this sequence 10 times. The re-
quired data table is as follows:
ABT:A10.00_B30.00_A30.00_725.67_002.00 _002.00_N10
or
ABT A10.00_B30.00_A30.00_725.67_002.00_002.00_N10
2x100 µs 2.00 V
100 ms 25.67 V
2 s+1 s 30.00 V
1 s 1 0.00 V
Please act like the following description of the operational
sequence:
